The Serbian midfielder has left Stamford Bridge after four successful seasons with the Blues to pen a three-year contract at Old Trafford.
United, who have handed Matic the No.31 shirt, will have the option to extend his terms by a further season.
The 28-year-old has joined the Red Devils for £40m and becomes their third major signing of the summer following their deals for Romelu Lukaku and Victor Lindelof.
Matic said: "I am delighted to have joined Manchester United. To work with Jose Mourinho once again was an opportunity I couldn’t turn down.
"I have enjoyed my time at Chelsea... read more

Related news

Nemanja Matic and Man Utd team-mates spotted at airport ahead of Dublin trip MANCHESTER UNITED have been spotted at the airport before heading out to Dublin for their friendly match against Sampdoria. 1 / 9 GETTY Man Utd spotted at airport The Red...

The Serb is moving to Old Trafford from Chelsea in a £40m deal.
A fee was agreed between the Premier League champions and United on Saturday.
Matic then travelled north to finalise personal terms and complete a medical.
And Starsport understand he’ll...

NEMANJA MATIC TO MANCHESTER UNITED LIVE TRANSFER UPDATES: All the latest on the Chelsea midfielder’s move to Old Trafford…
07:30: So how will Matic fit in at United?
Mourinho wants his former Chelsea man to get the best out of Paul Pogba and Matic’s...

Matic completed a £40m move to Old Trafford yesterday.
He’s been drafted in to sure up the base of Jose Mourinho’s midfield and give world-record buy Paul Pogba licence to move higher up the pitch.
And Swansea star Britton thinks United are getting a...

The Blues are looking at the Foxes star as a potential replacement for Nemanja Matic after he was sold to Manchester United.
Sky Sports journalist Kaveh Solhekol claims the Leicester man is not for sale though.
He tweeted: "Chelsea interested in...

The 28-year-old Serbia international agreed a three-year contract at Manchester United and yesterday completed a £40m switch.
The Blues reacted by tweeting a picture of the midfielder and wrote: “We thank Nemanja for his fantastic service and wish him...